Portion of a shoe sole



FIG. 1 is a perspective view of a portion of a shoe sole showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The area within the solid and dash-dot lines forms the claimed design.

The broken lines and areas within them depict portions of the shoe sole that form no part of the claimed design. 

The ornamental design for a portion of a shoe sole, as shown and described. 